KR102668451B1 - Scratch-free Timing Belt for Display Manufacturing - Google Patents

Abstract

It relates to a scratch-free timing belt for display manufacturing that can simultaneously prevent slipping and scratching of the glass member due to contact between the timing belt and the glass member during the transfer process of the glass member for the LCD or the glass member for the flat panel. A body having a toothed portion at the bottom for transporting a glass member for a flat panel, a nylon fiber layer in surface contact with the glass member for an LCD or a glass member for a flat panel, and provided on the body, wherein the nylon fiber layer is made of liquid EVA. (Ethylene-Vinyl Acetate) A structure formed by immersing nylon fibers in emulsion allows high-speed transport while simultaneously preventing slipping and scratching of the glass member during the transport process.

Description

Scratch-free Timing Belt for Display Manufacturing}

The present invention relates to a scratch-free timing belt for display manufacturing, and in particular, a display that can simultaneously prevent slipping and scratching of the glass member due to contact between the timing belt and the glass member during the transportation of the glass member for LCD or flat panel glass member. It relates to scratch-free timing belts for manufacturing.

Generally, glass for liquid crystal displays (LCD) or other flat panels is transported by a separate transport belt and processed into a desired shape.

For example, an LCD panel is completed through a process of bonding two glass substrates, that is, a color filter substrate and a TFT array substrate, and injecting liquid crystal between them, and driving to reproduce the screen on this completed LCD panel. It is manufactured through the process of completing the LCD module by installing the driving unit that applies the signal and the backlight assembly.

Since each process to complete the LCD module requires accurately moving the heavy load of the LCD panel to a cassette, etc., a transfer device with precise position control must be used. Therefore, it is common to use a timing belt for accurate position control.

A conventional timing belt type transfer device includes a drive pulley installed and driven at both ends of a frame, a timing belt mounted on the drive pulley and rotating, and a timing belt installed between the top of the frame and the timing belt to prevent the timing belt from sagging. It is composed of a plate that supports the timing belt, and the timing belt is a timing belt in which teeth are formed over the entire width of the belt.

However, the conventional timing belt-type transfer device configured as above has a problem in that when transferring a heavy object, the friction between the timing belt and the plate increases, making it impossible to transfer an accurate distance. Glass may shake or slip due to external factors such as vibration or impact, and scratches may occur at this time.

An example of a technology to solve this problem is disclosed in Patent Documents 1 to 3 below.

For example, in Patent Document 1 below, as shown in FIG. 1, a plurality of teeth 3 and tooth bottoms arranged at predetermined intervals along the longitudinal direction are provided on the running surface of the belt body 2 made of thermoplastic resin. 4), and a core wire (7) is embedded in the lower part of the toothed portion (3), and the toothed portion is covered with a toothed cloth (5), wherein the toothed cloth (5) is a length of the belt. It is a woven fabric made by using thermoplastic synthetic resin fibers as warp yarns in the belt width direction and using fluorine resin fibers as weft yarns in the belt width direction, and weaving these warp yarns and weft yarns, and the weaving crimp of the thermoplastic synthetic resin fibers used in the longitudinal direction of the belt is as described above. Disclosed is a resin belt that is larger than the woven crimp of fluorine-based resin fibers used in the belt width direction.

In addition, Patent Document 2 below includes a lower layer and an upper layer attached to the lower layer, the upper layer and the lower layer are in direct contact, the entire contact surface of the upper layer and the lower layer is flat, and the flat panel glass of the upper layer Only a portion of the facing surface is in contact with the glass for the flat panel, the upper layer includes a protrusion continuous in the longitudinal direction of the timing belt, an embossing is present on the upper surface of the protrusion, and the embossing is for the flat panel. A timing belt in contact with glass is disclosed.

On the other hand, Patent Document 3 below consists of a first layer composed of a rubber composition and a second layer adjacent to the first layer and composed of a urethane-based resin, and the second layer contains hydroxyl groups and amino groups in the rubber composition. Alternatively, it discloses a transmission belt formed by adding an active hydrogen compound having any one of the thiol groups to form a first layer, then applying a urethane resin to the first layer and curing it.

Republic of Korea Patent Publication No. 10-2300053 (registered on September 2, 2021) Republic of Korea Registered Utility Model No. 20-0470381 (registered on December 5, 2013) Japanese Patent Publication No. 2009-30683 (published on February 12, 2009)

In Patent Document 1 as described above, the adhesive strength between the thermoplastic resin of the belt body and the fabric is excellent, the peeling strength in the longitudinal direction of the belt is increased, the durability of the resin belt is improved, and wear resistance, sliding properties, and formability are improved. Although the resin belt has been described, there has been no disclosure regarding technology that can deal with scratches that may occur during the transportation of glass members such as glass for liquid crystal displays or glass for flat panels.

In addition, in Patent Document 2, embossing was provided on the upper layer to prevent damage that may occur to the flat panel glass during transportation, but the upper layer may be separated due to problems with the adhesion between the upper and lower layers. There was a risk that the above-described embossing would be damaged due to repeated use, causing scratches during the transportation of the glass.

On the other hand, Patent Document 3 is a structure in which a rubber layer and a urethane resin layer are bonded by high adhesive force, and Patent Document 3 also can cope with scratches that may occur during the transfer process of glass members such as glass for liquid crystal displays or glass for flat panels. The existing technology was not disclosed.

The purpose of the present invention is to solve the problems described above, and to simultaneously prevent slipping and scratching of the glass member due to contact between the timing belt and the glass member during the transportation of the glass member for an LCD or a flat panel glass member. The goal is to provide a scratch-free timing belt for display manufacturing.

Another object of the present invention is to provide a scratch-free timing belt for display manufacturing that can transfer a glass member for an LCD or a glass member for a flat panel at high speed.

Another object of the present invention is to provide a scratch-free timing belt for display manufacturing that can improve the adhesion and durability of the main body and the nylon fiber layer.

In order to achieve the above object, the timing belt according to the present invention is a scratch-free timing belt for display manufacturing, which includes a main body provided with a toothed portion at the bottom for transporting a glass member for an LCD or a glass member for a flat panel, and a glass member or flat panel for the LCD. It includes a nylon fiber layer provided on the main body and in surface contact with a glass member for a panel, wherein the nylon fiber layer is formed by immersing the nylon fiber in a liquid EVA (Ethylene-Vinyl Acetate) emulsion.

In addition, in the timing belt according to the present invention, the nylon fiber layer is provided on an EVA (Ethylene-Vinyl Acetate) material layer, the main body is made of an elastic polymer, and the nylon fiber layer and the EVA material layer are bonded by heat fusion. , the main body and the EVA material layer are bonded by heat fusion.

Additionally, in the timing belt according to the present invention, the nylon fiber layer is provided in the central portion of the main body, and EVA (Ethylene-Vinyl Acetate) sheets are provided on both sides of the nylon fiber layer.

In addition, the timing belt according to the present invention further includes a urethane layer provided on the upper part of the main body, and the nylon fiber layer and the EVA sheet are adhered to the urethane layer.

In addition, in the timing belt according to the present invention, the nylon fiber layer is characterized in that it is provided in a cross-linked structure with an EVA (Ethylene-Vinyl Acetate) sheet.

As described above, according to the scratch-free timing belt for display manufacturing according to the present invention, slipping and scratching of the glass member during the transfer process is simultaneously prevented by providing a nylon fiber layer in surface contact with the glass member for LCD or flat panel. The effect of being able to transport at high speed while preventing damage is achieved.

In addition, according to the scratch-free timing belt for display manufacturing according to the present invention, the nylon fiber layer and the EVA material layer are heat fused, and the main body and the EVA material layer are heat fused, thereby improving the adhesion and durability of the main body and the nylon fiber layer. is also obtained.

1 is a perspective view of a resin belt according to the prior art;
Figure 2 is a partially cut away perspective view of a scratch-free timing belt for display manufacturing according to the first embodiment of the present invention;
Figure 3 is a cross-sectional view of the timing belt shown in Figure 2;
Figure 4 is a partial plan view and cross-sectional view of a scratch-free timing belt for display manufacturing according to a second embodiment of the present invention;
Figure 5 is a partial plan view of a scratch-free timing belt for display manufacturing according to a modified example of the second embodiment of the present invention;
Figure 6 is a partial plan view of a scratch-free timing belt for display manufacturing according to a third embodiment of the present invention.

The above and other objects and new features of the present invention will become more clear by the description of this specification and the accompanying drawings.

The term "adhesion" used herein refers to the timing belt according to the present invention, which is maintained by a bonding force by an adhesive between the main body and the material layer, and has a holding force that sticks together and does not separate from each other. means to maintain.

In addition, the term "EVA material" used herein refers to a chemical material made of ethylene and vinyl acetate, and the "material layer" refers to a layer made of a material, for example, a thin film, a film, etc. there is.

[First Example]

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 2 and 3.

Figure 2 is a partially cut away perspective view of a scratch-free timing belt for display manufacturing according to the first embodiment of the present invention, and Figure 3 is a cross-sectional view of the timing belt shown in Figure 2.

As shown in FIG. 2, the scratch-free timing belt for display manufacturing according to the first embodiment of the present invention has a toothed portion 110 provided for mechanical transport by rotation of a wheel, pulley, roller, etc. provided with teeth. One main body 100, a plurality of wires 120 inserted in the longitudinal direction into the main body 100, an EVA (Ethylene-Vinyl Acetate) material layer 200 provided on the main body 100, a glass member for an LCD, or It may include a nylon fiber layer 300 provided on the EVA material layer 200 and in surface contact with a glass member for a flat panel.

For example, the main body 100 may be made of an elastic polymer such as polyurethane having a certain hardness and a certain coefficient of friction, and the toothed portion 110 is a part of the main body 100, as shown in FIG. 3. It protrudes from the bottom and is provided at regular intervals along the length of the main body. For example, it may be provided at an inclination of about 45°.

The wire 120 may be made of a metal material or the like to increase the strength of the timing belt. That is, the wire 120 may be made of a metal material such as steel wire or stainless steel wire, but is not limited thereto, and may be made of aramid fiber, glass fiber, carbon fiber, polyamide fiber, polyester fiber, PBO (polyparaphenyl Fine wires of fibrous materials such as lenbenzoxazole) fibers may be used individually or in combination of two or more types. In addition, the wire 120 may be a twisted wire made by combining any of the above-mentioned fine wires of metal or fine wires of fiber.

Additionally, as shown in FIGS. 2 and 3, a cover layer 140 may be provided on the lower part of the main body 100 to cover the mesh surface 130. The cover layer 140 may be made of a plastic material such as polyurethane, polyethylene, or polyamide, and may be prepared to have a lower coefficient of friction than the main body 100 made of an elastomer.

Meanwhile, the width of the main body 100 may be 10 to 500 mm, the thickness may be 1 to 20 mm, and the cover layer 140 may be provided to have a thickness of 0.1 to 1 mm. . In the present invention, the width of the main body 100 may be set to 25 mm for transport of a glass member for an LCD or a flat panel.

The EVA material layer 200 may be made of a chemical material combining ethylene and vinyl acetate with excellent adhesion to the main body 100 made of an elastic polymer such as polyurethane, and is attached to the upper part of the main body 100 with an adhesive. do.

The nylon fiber layer 300 is formed by immersing nylon fibers in liquid EVA emulsion, and the surface of the nylon fiber layer 300 is formed at the same level as the EVA material layer 200, so it is a glass member for LCD or glass for flat panel. There are fewer scratches when in contact with a member, and EVA fluid has greater friction when in contact with a glass member than nylon material, preventing slipping and speeding up the transfer speed.

Meanwhile, the EVA material layer 200 has superior adhesive properties to polyurethane compared to the nylon fiber layer 300 when bonded to the main body 100 made of polyurethane, so the adhesive strength can be improved.

In addition, the EVA material layer 19 and the nylon fiber layer 300 can be bonded by heat fusion because the nylon fiber layer 300 contains liquid EVA emulsion, and the main body 100 and the EVA material layer ( The bonding of 19) can also be carried out by heat fusion.

As described above, in the first embodiment according to the present invention, for example, by providing a nylon fiber layer 300 in surface contact with a glass member for an LCD or a glass member for a flat panel, the glass member is provided during the transfer process by the timing belt. It is possible to transport at high speed while simultaneously preventing slipping and scratching of the member. In addition, the nylon fiber layer 300 and the EVA material layer 200 are heat-sealed, and the main body 100 and the EVA material layer 200 are heat-sealed, thereby increasing the adhesive strength between the main body 100 and the nylon fiber layer 300. It can also be improved.

[Second Embodiment]

Next, a second embodiment of the present invention will be described with reference to FIG. 4.

Figure 4 is a partial plan view and cross-sectional view of a scratch-free timing belt for display manufacturing according to a second embodiment of the present invention, Figure 4 (a) is a partial cutaway plan view of the timing belt according to the second embodiment, and (in Figure 4) b) is a cross-sectional view of the timing belt according to the second embodiment. In addition, the second embodiment is applied to the main body 100 of the first embodiment, the same components as those of the first embodiment are assigned the same reference numerals, and repetitive description thereof is omitted.

The scratch-free timing belt for display manufacturing according to the second embodiment of the present invention is applied to the main body 100 of the first embodiment described above, and is provided on the main body 100, as shown in (a) of FIG. 4. A nylon fiber layer 300 in surface contact with a glass member for an LCD or a glass member for a flat panel, an EVA (Ethylene-Vinyl Acetate) sheet 400 provided on both sides of the nylon fiber layer 300, the nylon fiber layer 300 and the EVA It may include a urethane layer 500 adhered to the lower part of the sheet 400.

As shown in (b) of FIG. 4, the nylon fiber layer 300 is adhered to the first urethane layer 310, and each EVA sheet 400 provided on both sides of the nylon fiber layer 300 is attached to the second urethane layer. It is bonded to the layer 410, and the first urethane layer 310 and the second urethane layer 410 are bonded to the urethane layer 500 by heat fusion. Additionally, the urethane layer 500 and the main body 100 may also be bonded by heat fusion.

Meanwhile, the nylon fiber layer 300 and the first urethane layer 310 can be bonded and the EVA sheet 400 and the second urethane layer 410 can be bonded using an adhesive. The adhesive includes, for example, 40 to 50% by weight of epoxy-modified acrylic copolymer, 20 to 30% by weight of phenol-modified rosin ester resin, 10 to 20% by weight of thermoplastic polyurethane resin, 6 to 10% by weight of ethylene vinyl acetate copolymer, It may be prepared as a composition that additionally contains 1 to 5 parts by weight of an adhesion promoter in 100 parts by weight of a mixture containing 1 to 5 wt% of terephthalic acid-modified polyamide resin and 1 to 5 wt% of polyisocyanate resin. In addition, the adhesion promoter may include 50 to 60% by weight of hydroxypropyl acrylate (HPA), 20 to 30% by weight of terpene phenolic resin, and 15 to 25% by weight of hydroxyethyl acryloyl phosphate. there is.

In addition, in the scratch-free timing belt for display manufacturing according to the second embodiment of the present invention, as shown in Figures 4 (a) and (b), the EVA sheets 400 provided on both sides of the nylon fiber layer 300 are It may be provided with a separation space 101 to reduce the surface contact area with the glass member for LCD or the glass member for flat panel.

However, it is not limited to this, and as shown in FIG. 5, the EVA sheet 400 may be prepared in close contact with both sides of the nylon fiber layer 300. Figure 5 is a partial plan view of a scratch-free timing belt for display manufacturing according to a modified example of the second embodiment of the present invention. That is, in a modified example of the second embodiment of the present invention, for example, a nylon fiber layer 300 and an EVA sheet 400 are each provided with a width of 25 mm, and these are divided into three equal parts in the width direction, as shown in Figure 5. As shown, each can be mounted on the urethane layer 500 and bonded by heat fusion.

As described above, in the second embodiment of the present invention, the nylon fiber layer 300 and the first urethane layer 310 are bonded with an adhesive, and the EVA sheet 400 and the second urethane layer 410 are bonded with an adhesive. After preparing each, each is mounted on the urethane layer 500 provided on the top of the main body 100 in the state shown in Figure 4 or 5, and then integrated by heat fusion, thereby forming a timing belt without scratches for display manufacturing according to the present invention. can be produced.

In addition, in the description of the second embodiment, the nylon fiber layer 300 and the first urethane layer 310 are adhered with an adhesive, and the EVA sheet 400 and the second urethane layer 410 are adhered with an adhesive, and then the urethane layer Although the structure is shown to be bonded to 500, it is not limited to this, and a structure in which the nylon fiber layer 300 and the EVA sheet 400 are bonded to the urethane layer 500 with an adhesive can also be applied.

Therefore, in the second embodiment, the adhesive strength between the main body 100 and the nylon fiber layer 300 can be further improved compared to the first embodiment.

[Third Embodiment]

Additionally, a third embodiment of the present invention will be described with reference to FIG. 6.

Figure 6 is a partial plan view of a scratch-free timing belt for display manufacturing according to a third embodiment of the present invention. Meanwhile, the configuration of the third embodiment is also applied to the main body 100 of the first embodiment, and the same components as those of the first embodiment are assigned the same reference numerals and repeated descriptions are omitted.

In the above-described second embodiment, the nylon fiber layer 300 and the EVA sheet 400 are bonded on the urethane layer 500 bonded to the main body 100 in the longitudinal direction of the timing belt as shown in FIGS. 4 and 5. Although the structure is shown, in the third embodiment, as shown in FIG. 6, the nylon fiber layer 300 and the EVA sheet 400 are provided on the urethane layer 500 as warp and weft threads, respectively, and are cross-linked to each other. It could be.

A first urethane layer 310 and a second urethane layer 410 are attached to each of the nylon fiber layer 300 and the EVA sheet 400 with an adhesive, and then cross-linked to each other as shown in FIG. 6. After being prepared, it may be mounted and adhered on the urethane layer 500. Alternatively, the nylon fiber layer 300 and the EVA sheet 400 may be cross-linked to each other and then bonded to the urethane layer 500 using an adhesive.

In the third embodiment described above, slippage and scratches of the glass member transported by the timing belt can be more effectively prevented compared to the first embodiment.

Although the invention made by the present inventor has been described in detail according to the above-mentioned embodiments, the present invention is not limited to the above-described embodiments and can of course be changed in various ways without departing from the gist of the invention.

By using the scratch-free timing belt for display manufacturing according to the present invention, it is possible to transfer at high speed while simultaneously preventing slipping and scratching of the glass member during the transfer process.

100: main body
200: EVA material layer
300: Nylon fiber layer

Claims (5)

A scratch-free timing belt for display manufacturing,
A main body with a toothed portion at the bottom for transporting glass members for LCDs or flat panels,
A nylon fiber layer provided on the main body and in surface contact with the LCD glass member or the flat panel glass member,
The nylon fiber layer is formed by immersing nylon fibers in liquid EVA (Ethylene-Vinyl Acetate),
The nylon fiber layer is provided on an EVA (Ethylene-Vinyl Acetate) material layer,
The body is made of elastomer,
The nylon fiber layer and the EVA material layer are bonded by heat fusion,
A timing belt, characterized in that the main body and the EVA material layer are bonded by heat fusion. delete In paragraph 1:
The nylon fiber layer is provided in the central portion of the main body,
A timing belt, characterized in that EVA (Ethylene-Vinyl Acetate) sheets are provided on both sides of the nylon fiber layer. In paragraph 3,
Further comprising a urethane layer provided on the upper part of the main body,
A timing belt, characterized in that the nylon fiber layer and the EVA sheet are adhered to the urethane layer. In paragraph 1:
A timing belt, characterized in that the nylon fiber layer is provided in a cross-linked structure with an EVA (Ethylene-Vinyl Acetate) sheet.

Images